JP2004019747A - Float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a float type drain trap where an upper valve element and a lower valve element can be simultaneously seated at upper and lower valve ports, respectively. <P>SOLUTION: An inlet 4, a valve chest 3, and an outlet 11 are formed by a casing comprising a body 1, a lid body 2, and a seat member 9. The upper and lower valve ports 12, 13 on the same vertical upper and lower shafts for allowing the valve chest 3 to communication with the outlet 11 are provided in the seat member 9. An upper valve element 22 for opening and closing the upper valve port 12 is arranged in the upper valve chest 3 of the upper valve port 12, a lower valve element 15 for opening and closing the lower valve port 13 is arranged at the side of the upper outlet 11 of the lower valve port 13, and the float 14 is arranged at the side of the valve chest 3 of the upper valve element 22. The float is connected with the upper valve element 22 by a screw. A lower element upper guide rod 16 is formed on the upper surface of the lower valve element 15 in one piece. The upper end face of the lower valve element upper guide rod 16 comes into contact with the lower end face of the upper valve element 22 at a position where the upper valve element 22 is seated at the upper valve port 12 and the lower valve element 15 is seated at the lower valve port 13. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention opens and closes a valve port that connects a valve chamber and an outlet by the rising and falling of a float accommodated in a valve chamber, and automatically drains steam, compressed air, and condensed water generated in a gas piping system. More particularly, the present invention relates to a float drain trap capable of opening and closing a valve port having a large opening area.
[0002]
[Prior art]
A conventional float type drain trap capable of opening and closing a valve port having a large opening area is disclosed in, for example, Japanese Patent Application Laid-Open No. 53-1327. As understood from the publication, an inlet, a valve chamber, and an outlet are formed in a casing, and an upper valve port and a lower valve port are provided on the same axis in the upper and lower directions communicating the valve chamber and the outlet, and the upper valve port is opened and closed. The valve element is disposed in the valve chamber above the upper valve port, the lower valve element for opening and closing the lower valve port is disposed on the outlet side above the lower valve port, and the upper valve element and the lower valve element are screwed together. A float is connected to the valve body and arranged in the valve chamber. The upper valve body and the lower valve body are made up of an upper valve port and a lower valve port by causing the fluid pressure of the valve chamber and the outlet to act in opposite directions on the upper valve body and the lower valve body. It can open and close a valve port with a large opening area.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional float type drain trap, even if the joint portion between the upper valve body and the lower valve body is machined with high accuracy, the screwing amount and the screwing angle when the upper valve body and the lower valve body are joined together are shifted. There has been a problem that the upper valve body and the lower valve body cannot simultaneously seat on the upper valve port and the lower valve port.
[0004]
Therefore, a technical problem of the present invention is to provide a float type drain trap in which an upper valve body and a lower valve body can be simultaneously seated on an upper valve port and a lower valve port.
[0005]
[Means for Solving the Problems]
The technical means of the present invention taken in order to solve the above technical problem is to form an inlet, a valve chamber, and an outlet in a casing, and to connect the valve chamber and the outlet with an upper valve port and a lower valve on the same upper and lower axes. An upper valve body for opening and closing the upper valve port is disposed in the valve chamber above the upper valve port, and a lower valve body for opening and closing the lower valve port is disposed on the outlet side above the lower valve port; The float type drain trap is characterized in that a float is arranged in a valve chamber connected to a body, and a lower end surface of an upper valve body and an upper end surface of a lower valve body are brought into contact with each other.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
In the float type drain trap of the present invention, the upper valve body and the lower valve body are not screwed together, but the lower valve body and the lower valve body are brought into contact with each other. The valve body can simultaneously seat on the upper valve port and the lower valve port.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A cover 2 is fixed to the main body 1 by fastening means (not shown) such as bolts, and a casing having a valve chamber 3 therein is formed. An inlet 4 is formed in the upper part of the main body 1 and communicates with the valve chamber 3 through an inflow passage 6 partitioned by a partition wall 5. A ventilation hole 7 is opened at the upper end of the partition 5.
[0008]
A valve seat member opening 8 is opened in the main body 1, and a valve seat member 9 protruding into the valve chamber 3 is fixed by fastening means (not shown) such as a bolt. An outlet 11 communicating with the valve seat member 9 through an outflow passage 10 formed therein is formed. The upper valve port 12 is opened on the upper wall of the valve seat member 9 and the lower valve port 13 is opened on the lower wall. The valve chamber 3 communicates with the outlet 11 from the upper valve port 12 and the lower valve port 13 through the outflow passage 10. The lower valve port 13 is formed below the upper valve port 12 and on the same axis as the upper valve port 12. The opening area of the lower valve port 13 is formed to be the same as or slightly smaller than the opening area of the upper valve port 12.
[0009]
An upper valve body 22 for opening and closing the upper valve port 12 is disposed on the valve chamber 3 side above the upper valve port 12, and a lower valve element 15 for opening and closing the lower valve port 13 on the outlet 11 side above the lower valve port 13. The float 14 is arranged on the valve chamber 3 side above the upper valve body 22. The upper end of an upper valve body guide rod 23 integrally formed on the upper surface of the upper valve body 22 is screw-connected to a lower projection formed on the lower surface of the float 14 to connect the float 14 and the upper valve body 22. A lower valve body upper guide rod 16 is formed integrally with the upper surface of the lower valve body 15, and a lower valve body lower guide rod 17 is formed on the same axis as the lower valve body upper guide rod 16. At a position where the upper valve body 22 is seated on the upper valve port 12 and the lower valve body 15 is seated on the lower valve port 13, the upper end surface of the lower valve body upper guide rod 16 contacts the lower end surface of the upper valve body 22. The upper valve body guide rod 23 is vertically slidably guided by an upper valve body support member 24 fixed to the valve seat member 9, and the lower valve body upper guide rod 16 is vertically moved by an upper support member 18 fixed to the valve seat member 9. The lower valve body lower guide rod 17 is vertically slid and guided by a lower support member 19 fixed to the valve seat member 9. The float 14 is vertically slid and guided by a support cylinder 20 having a large number of communication holes fixed between the lid 2 and the valve seat member 9.
[0010]
The operation of the above embodiment is as follows.
In the illustrated state, the drain flowing from the inlet 4 into the valve chamber 3 through the inflow passage 6 is small, the float 14 descends, the upper valve body 22 is seated on the upper valve port 12, and the lower The valve closing state in which the valve body 15 is pushed down and seated on the lower valve port 13 is shown. When the liquid level of the valve chamber 3 rises due to the drain flowing into the valve chamber 3 from the inlet 4 through the inflow passage 6, the float 14 floats with the rise of the liquid level, and the upper valve body 22 separates from the upper valve port 12. At the same time, as the float 14 floats, the lower valve body 15 is lifted by the fluid pressure of the valve chamber 3 and separates from the lower valve port 13, and the upper valve port 12 and the lower valve port 13 are opened to drain the valve chamber 3. From the outflow passage 10 to the outlet 11. By causing the fluid pressures of the valve chamber 3 and the outlet 11 to act on the upper valve body 22 and the lower valve body 15 in opposite directions, it is possible to open and close a valve port having a large opening area composed of the upper valve port 12 and the lower valve port 13.
[0011]
When the liquid level in the valve chamber 3 drops due to the discharge of the drain, the float 14 descends as the liquid level falls, and the upper valve body 22 sits on the upper valve port 12, and the lower valve body falls as the float 14 descends. 15 is pushed down and returns to the valve-closed state seated on the lower valve port 13.
[0012]
【The invention's effect】
The present invention has the following specific effects.
As described above, the float type drain trap according to the present invention is configured such that the upper valve body and the lower valve body are not screwed to each other and the lower end surface of the upper valve body and the upper end surface of the lower valve body are in contact with each other. An excellent effect is obtained in that the valve body and the lower valve body are simultaneously seated on the upper valve port and the lower valve port, and there is no leakage of steam, compressed air or gas.
[Brief description of the drawings]
FIG. 1 is a sectional view of a float type drain trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve room 4 Inlet 9 Valve seat member 11 Outlet 12 Upper valve port 13 Lower valve port 14 Float 15 Lower valve element 22 Upper valve element

Claims (1)

An inlet, a valve chamber, and an outlet are formed in the casing, and an upper valve port and a lower valve port are provided on the same axis in the upper and lower directions communicating the valve chamber and the outlet. The lower valve body that opens and closes the lower valve port is arranged on the outlet side above the lower valve port, connected to the upper valve body, and a float is arranged in the valve chamber. A float type drain trap wherein an upper end surface of a lower valve body is abutted.

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